GCN Circular 11283
Subject
GRB 100915A: Correction to Swift-BAT refined analysis
Event
Date
2010-09-15T14:56:36Z (15 years ago)
From
Takanori Sakamoto at NASA/GSFC <takanori@milkyway.gsfc.nasa.gov>
T. Sakamoto (GSFC/UMBC), S. D. Barthelmy (GSFC)
(i.e. the Swift-BAT team):
We would like to make corrections to the BAT refined analysis of GRB 100915A
(GCN Circ. 11281). The BAT time-averaged spectrum is best fit by a simple
power-law (PL) model rather than a power-law with an exponential cutoff (CPL)
model. We believe a low signal to noise in the observed spectrum of this burst
causes a significant improvement in chi2 by a CPL model over a PL model. We
would like to correct the 3rd paragraph of GCN Circ. 11281 to:
"The time-averaged spectrum from T-36.3 to T+72.2 sec is best fit by a simple
power-law model. The power law index of the time-averaged spectrum is
1.50 +- 0.24. The fluence in the 15-150 keV band is 1.5 +- 0.2 x 10^-06 erg/cm2.
The 1-sec peak photon flux measured from T+8.76 sec in the 15-150 keV band
is 0.5 +- 0.3 ph/cm2/sec. All the quoted errors are at the 90% confidence
level. "
We apologize for possible inconvenience. We would like to thank Eleonora Troja
for pointing this issue.